An atom of the most common isotope of gold, Au, has __________ protons, __________ neutrons, and __________ electrons.

79, 197, 197

197, 79, 118

79, 118, 79

118, 79, 39

79, 118, 118

79, 118, 79

The average atomic weight of copper, which has two naturally occurring isotopes, is 63.5. One of the isotopes has an atomic weight of 62.9 amu and constitutes 69.1% of the copper isotopes. The other isotope has an abundance of 30.9%. The atomic weight (amu) of the second isotope is __________ amu.

64.1

64.8

28.1

63.8

63.2

64.8

Which element in Group IA is the most electropositive?

francium

Potassium is a __________ and chlorine is a __________.

metal, metalloid

nonmetal, metal

metal, metal

metal, nonmetal

metalloid, nonmetal

metal, nonmetal

Of the choices below, which one is not an ionic compound?

MoCl6

PCl5

RbCl

PbCl2

NaCl

PCl5

Methane and ethane are both made up of carbon and hydrogen. In methane, there are 12.0 g of carbon for every 4.00 g of hydrogen, a ratio of 3:1 by mass. In ethane, there are 24.0 g of carbon for every 6.00 g of hydrogen, a ratio of 4:1 by mass. This is an illustration of the law of __________.

octaves

conservation of mass

multiple proportions

conservation of matter

constant composition

multiple proportions

Of the three types of radioactivity characterized by Rutherford, which are particles?

β-rays

α-rays and γ-rays

γ-rays

α-rays, β-rays, and γ-rays

α-rays and β-rays

α-rays and β-rays

An atom of 79Br contains __________ neutrons.

35

44

72

114

79

44

The element X has three naturally occurring isotopes. The masses (amu) and % abundances of the isotopes are given in the table below. The average atomic mass of the element is __________ amu.

17.11

16.90

16.90

17.65

17.20

17.20

When a metal and a nonmetal react, the __________ tends to lose electrons and the __________ tends to gain electrons.

nonmetal, metal

nonmetal, nonmetal

metal, nonmetal

metal, metal

None of the above, these elements share electrons.

metal, nonmetal

Which species has 48 electrons?

(118/50) Sn2+

(116/50) Sn4+

(68/31) Ga

(112/48) Cd2+

(48/22) Ti

(118/50) Sn2+

Predict the charge of the most stable ion of iodine.

1-

2-

3+

1+

2+

1-

The species __________ contains 16 neutrons.

36Cl

34S2-

16O

80Br-

31P

31P

The correct name for H2SO3 is __________.

sulfur hydroxide

hydrosulfuric acid

hydrosulfic acid

sulfurous acid

sulfuric acid

sulfurous acid

A correct name for Fe(NO3)2 is __________.

ferrous nitrate

ferric nitrate

iron nitrite

ferric nitrite

ferrous nitrite

ferrous nitrate

The formula for a salt is XBr. The X-ion in this salt has 46 electrons. The metal X is __________.

Cd

Ag

Cu

Pd

Cs

Ag

The correct name for CCl4 is __________.

carbon perchlorate

carbon chloride

carbon chlorate

carbon tetrachloride

carbon tetrachlorate

carbon tetrachloride

Chromium and chlorine form an ionic compound whose formula is CrCl3. The name of this compound is __________.